Lamp-shade holder.



J. CRUIKSHANK.

LAMP SHADE HOLDER.

APPLICATION FILED MAY 17, 1909.

@ 3598i, Patented Mar. 8, 1910,

Arf/onmersl figures, and in Which- ED sTAfrEs raw-1 ll JOHN GRUIKSHANK, 0F SHAMOKIN, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD T0 I JOSEPH IVI. DUNKELBERGER, OF MOUNT CARMEL, PENNSYLVANIA.

LAMP-SHADE HOLDER.

To all whom t may concern.'

Be it known that I, Jox-[N CRUuisi-IANK, a citizen of the United States, and a resident of Shamokin, in thecounty of Northumberland and State of Pennsylvania, have invented a new and Improved Lamp-Shade Holder, ofwhich the following is a full, clear, and exact description.y

This invention relates to certain improvements in lam-p shade holders, and more par ticularl y to an improved construction for "facilitating the attaclnnentof the shade holder to the socket ofan incandescent electric light.

In my improved securing lneans, I` avoid the use of screws, boltsor vother similar fastenin members, and I also avoid the necessity or relying entirely upon Lthe resiliency of the metal. The shade may be ,removed by rotatingthe same through only a =portion of a revolution rather than by turning it a number of times as is necessary when the shade is provided with screw threads. In my improved const ruction I employ a clamping ring which is comparatively narrow and of light construction and which springs 4into place above the ordinary bead `on the lamp socket, and to this ring is secured the lamp 'shade by a special form of bayonet joint.

The neck portion of the shade holder prevents the spring ring from expanding and slipping over the bead of the socket, and as the neck is not split or particularly resilient,

it cannot slip olf the spring ring.

.Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the Figure 1.is a side elevation of a shade holder constructed in accordance' with my invention, a portion thereof being broken away; Fig. 2 is a top plan vi'ew of the main or body portion of the holder; Fig. 3 is la side elevation of the part shown' in Fig. 2, a portion of the neck being broken away; Fig. 4 is a side elevation of the spring ring; and Fig. 5 is an end View of the ring, portions thereof being broken away.

The body portion 10 of my improved holder is preferably substantially conical inform and is provided with a depending flange l1 carrying inwardly extendingV hooks 12,-- substantiall `as set forth in my prior 'patent number 89 ,194, Aissued August 25, 1908.

Iatented Mar. 8, 1910.

The body provided with a substantially cylindrical collar or neck portion 13,.adapted to encircle the socket of `an incandescent lamp, and is so constructed as to facilitate its ready attachment to the socket.

In Figure 1, I have shown a standard form of lamp socket 19,which is provided with an annular bead 15 adjacent the end carrying' the bulb 16. In the reduced portion intermediate this bead and the upper portion of the socket, I provide a spring ring 17 formed of sheet metal and having suiiicient resiliency to slip over the bead 15 and to clamp the reduced portion of the socket.

This spring ring is -provided with oppositely-disposed outwardly-extending bosses, knobs or rounded projectionslS, struck u J from the metal intermediate the upper an the lower edges of the ring. The split in the ring may, if desired, be provided with upwardly-extending flanges or projections 14;, 14, by means of which the ring may be held from rotation while the body of the holder is being secured in place. The neck or colla;l 13 of the holder is provided with grooves 20 intermediate its upper and lower edges and each extending circumferentially through a portion of a revolution. Each groove at one end, is connected with an inwardly-extending groove 21, terminating at the upper end of the neck lor collar, and each groove 20 at its opposite end gradually decreases in size and merges into the cylindrical surface of the neck or col-lar. Each longitudinallyextending groove 21 is adapted to receive its corresponding boss or knob 1S onthe split ring 17, and the circumferentialV grooves 20 receive said bosses or knobs. `As the body of the shade with its collar is rotated in respect to the split ring, the bosses or knobsare caused to travel along the circumferential grooves 20, and as the latter gradually decrease in size, the collar and the split ring become firmly clampedV together and held against accidental removal from the lamp socket. The outer surfaces of the grooves or beads 2O are preferably formed with indeni tations or transverse ridges 22, which tend to restrictthe movement of the bosses along` the grooves and to act as locking means to prevent the accidental return movement ofv the bosses. The neck or collar 13 incloses the ring and partially conceals the latter from'- view, and it also tends to contract lthe ring' and make the latter bind the socket.

All of the parts going to make up my improved device are formed from stamped metal and may be made at very little eX# pense.y The entire device is very simple and positive in. its operation, and no screwdriver, Wrench, or other tool is needed in securing the device in place.

Various changes'may-'be made in the construction of the device and Within the scope of the appended claims, Without departing from the spirit of-my invention.

Having' thus vdescribed my invention, l claim as new'and `desire to secure by Letters i Patent.:

l. A shadev holder, comprising a split ring adapted ftoA engage an electric light soc :et and presenting an outwardly-extending knob or boss,I and ,a holder having a neck or collar adapted to encircle said ring and provided with a bayonet groove vto j receive said knob or boss.

21A shade holder, comprising a split ring adapted to engage a lamp socketabove the bead in the latter and presenting an outwardly-extending projection, and a holder having" a neck or collar provided with a bayonet groove to receive said projection, said groove being provided With ridges or projections along the length thereof.

3. vA shade holder, comprising a split ring adapted to engage a lamp socket above the bead in the latterand presenting an out- Wardly-extending projection, and a holder having a neck or collar provided with a bayonet `groove to receive said projection, saidy groove being gradually reduced in size toward one end thereof and merging into the circumferential Wall of the collar.

`jection. v

6. A shade holder, comprising a split 4. shadeholder, comprising a splitringV adapted to engage a lamp socket above the bead in the latter and presenting an out- Wardly-extending projection, and a holder having a neck or collar provided with a bayonet v'groove 'to receive said projection,

ring adapted to engage an electric light socket above the bead in the latter and 'presenting an outwardly-exteuding projection, andi a holder having a neck adapted to encircle Said ring to prevent the expanslon of the latter and the Slipping of said ring past said bead, said neck being providedv with a bayonet groove to receive said projection.

'In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN CRUIKSHANK. Witnesses:

FRED B. Mosnn, NAOMI EDWARDS.

o. A. shade holder, comprising a ring 

